Incandescent lamp.



No.- 740,253. PATENTED SEP-T. 29, 1903.

L. DENAYROUZE. INGANDBSGBNT LAMP.

APPLICATION FILED APB. 19. 1899. N0 MODEL. 8 SHEETS-SHEET 1.

' No. 74.0.25a- PATENTmsEPT-29, 1903'. L. DENAYROUZB. moANDEsCBNT LAMP.

APPLICATION FILED APB. 19. 1899.

1w.- Monm.. '2 SHEETS-SHEET 2.

UNITED STATES IrPatented September Q9, 1903.

.PATENT OFFICE.

'LOUIS DENAYROUZE, OF NEUILLYSURSEINE, FRANCE.

iNoANDEsCI-:NT LAMP.

SPECIFICATION forming part f Letters Patent No. 740,253, dated September29, 1903.

Application lledApril 19, 1899.

`To all whom, it may] concern:

A kinds of alcohol and other volatile liquids,

oils, fats, and resins by the waste heat of the incandescent burner,such vapors or gases being then led to the mixing-chamber of the burnerto be mixed with the air requisite for combustion within theincandescent mantle. For this purposeI employ in .the case of volatileliquids--such as alcohol ether, volatile oils, te-a vaporizing device inaddition to the burner. In the case of liquids that require in additionto vaporization' the application of a higher heat before being fed tothe burner I employ in addition 'to the burner both a vaporizer and agasifying device. In the case of solid combustibles that require firstto be liquefied or of liquids that are volatilized with difficulty Iemploy in addition to the burner and vaporizer and, if necessary, thegasifier a melting appliance.

Figure 1 of the accompanying drawings shows a vertical's'ection, to asmall scale, of a lamp arranged to burn gas from alcohol or volatileessences. Fig. 2 shows, to a larger scale, the upper part of the lamp.Fig. 3 is a plan view of the tube I. Fig. 4 is a sectional elevationshowing the upper part of a lamp adapted to burn liquids which it isdesirable should be subjected to a considerable degree of heat. Fig. 5is a view similar to Fig. e of a form of my invention adapted to burnsolid combustibles which are capable of liquefaction.

This is composed of a reservoir for alcohol A, which is filled throughthe orice C, capable of hermetic closure. A tube D, passing through thebottom B of the reservoir and rising up to the top, serves for theadmission of compressed air to the upper surface of the alcohol, and thetube E, which passes down to the bottom B of the reservoir A, serves toforce the liquid under the action of the air, which is forced by thebellows F, of caout- Serial No. 713,538. (No model.)

chouc or other flexible material. This is operated by a coiled spring Gfor forcing the air, the rod B of which spring connects the bottom ofthe bellows with the top of the spring. The spring G is placed in ahermeticallyclosed tube C', from which the compressed air from thebellows is led through tube D to the reservoirA.Thisreservoirissimplyscrewed on the threaded part forming the cap of thetube C'. A caoutchouc pump H, provided with two check-Valves ci a',serves for charging the bellows F when required. The tube E, throughwhich the air is forced, has a screw plug-cock L With coned end, onwhich is branched the vaporization-tube I. This tube may be filled withwire or pieces of silver or other goed heat-conducting material. Itrises to the burnerN and thence to above the incandescent mantle M,whereit is formed into a spiral coil of, preferably at least, a completering. For example, the coil may contain substantially two completerings, as shown iu Fig.

3. From the center of this spiral a tube descends to the base of theburner. Instead of using pure alcohol as combustible liquid alcoholenriched with'other substances rich in combustible elements, whichcannot burn alone, may be used. Y Such are vegetable or animalhydrocarbons--snch as potato-spirit, glycerin, essence of turpentine,camphor, resins, gums, waxes, vegetable oils-such as olive, nut, colzaoils, and the like-animal oils, fish-oils, grease, tallow, fatty acids.The alcohol serves as solvent of the whole or of component parts ofthese substances and forms the vehicle thereof in conveying the samefrom the lamp to the burner. When the liquid to be vaporized is notalcohol or essences, but petroleum, the vaporizing-tube forms one ormore convolutious I', Fig. 4, around the burner. The tube' t, whichdescends from the spiral at top of the mantle, is soldered to a platinumtube O, (preferably of a diameter which equals or is smaller than thatof the tube t,) which forms a bridge over the wire-gauze or perforateddisk Q. The tube O constitutes more particularly the gasier. The tubetdescends at t' to the base of the burner.

The lamp operates as follows: The her metio stopper C is unscrewed, andthe reservoir A is i'llled threequarters full with com` IOO bycompressing the spring, the plug-cock L bustible liquid. After screwingon the stopper again the pump H is actuated so as to force aix` into anddistend the bellows F, thereso as to form a small recipient for theliquefaction of a small quantity of the fatty or resinous body employed.Into this space penetrates a rod T, of good heat-conducting metal, whichpasses up through the reservoirA and l up to the top of the coil I,Where it is enlarged to a disk form X. A tube Z passes through thereservoir, forming a channel inclosingy the rod T and the forcing-tube Efor prevent`l ing the absorption of the heat by the Whole, mass ofcombustible in the reservoir A. The bellows of the lamp may be separatefromy the bodyand constitute a compressor for feedj ing the air from adistance either to one orj to a number of lamps situated in thedifferent localities or in the streets. The air stored in the compresserunder slight pressure isE conveyed to the lamps through a very small itube or channel, from which branch tubes:

lead to the separate lamps.

Having thus described this invention and the best means for carrying thesame into effeet, I claim- 1. The combination with alamp-burnercomprising a Bunsen tube and a refractoryincandescing-mantle, of a receptacle for hydrocarbon fuel, means forcausing a pressure onthe fuel in said receptacle, and a discharge-tubefrom said receptacle through which the hydrocarbon is forced by thepressure, said discharge-tube extending verticallyin proximity to themantle so as to produce an initial heating of the fuel therein,beingformed into asubstantiall y horizontal coil ofat least one complete ringimmediately above the mantle so as to receive directly substantially theentire column of heat arising therefrom and to produce a substantiallycomplete vaporization of the fuel, extending thence in close proxlirnityto the mantle to additionally heat the Vapor, thence to a gasifying-tubeof platinum situated immediately over the Bunsen tube to completelygasify the fuel, and extending tinally to the Bunsen tube to conduct theVapor thereto.

2. A lamp adapted to burn fatty fuel solid at ordinary temperatures, andcomprising in combination a lamp-burner including a Bunsen tube and arefractoryincandescing-mantle, a receptacle lfor the fuel, means forcausing a pressure on the fuel in said receptacle, a discharge-tube fromsaid receptacle th rough which liquid fuel may be forced by pressure,said discharge-tube extending vertically in proximity to the mantle soas to produce an initial heating `o f the fuel therein, beingy formedinto a substantially horizontal coil of at least one complete ringimmediately above the mantle so as to receive directly substantially theentire column of heat arising therefrom and to produce a substantiallycomplete Vaporization of the fuel, extending thence in close proximityto the mantle to additionally heat the vapor, thence to a gasifying-tubeof platinum situated immediately over the Bunsen tube to completelygasify the fuel, and extending finally to the Bunsen tube to conduct thevapor thereto, and means for liquefying the solid fatty matter in theVessel, comprising a conducting-rod extending from a point adjacent tothe burner into said vessel and adapted to conduct sufficient heatthereinto for such purpose.

In witness whereof I have hereunto signed my name, this 4th day ofApril, 1899, in the presence of two subscribing Witnesses.

LOUIS DENAYROUZE.

Witnesses:

J ULEs ARMENGAUD, Jeune, EDWARD P. MACLEAN.

